Author Archives: Charles

How can I merge PDF files when one of them requires password?

The sample codes below demonstrate how you can merge multiple PDF files when one of them is encrypted by an open password or a permissions password. You are strongly recommended to use the powerful tool: VeryPDFToobox.using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace … Continue reading

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How can I unpack PDF page streams for editing PDF in a text editor?

Please view the following sample codes which clearly show how to unpack PDF page streams for editing PDF in a text editor. The recommended tool is VeryPDFToobox.using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace Call_PDFToolBoxCom{    class Program    {        static void Main(string[] args)        {            … Continue reading

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How can I repair PDF's corrupted XREF table and stream lengths?

If you have VeryPDFToobox installed on your computer, you can use it to repair corrupted XREF tables and streams length of PDF quickly. The sample below shows a way to solve such a problem. using System; using System.Collections.Generic; using System.Linq; … Continue reading

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How can I split a multi-page PDF file into single-page PDF files?

You can split a multi-page PDF file into several single-page PDF files at a time by using VeryPDFToobox. The sample codes show how to split.using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace Call_PDFToolBoxCom{    class Program    {        static void Main(string[] args)        {            string strExePath … Continue reading

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What’s the difference between user password and owner password?

A PDF file may be encrypted for security, or digitally signed for authentication. The standard security provided by Acrobat PDF consists of two different methods and two different passwords, "user password", which encrypts the file and prevents opening, and "owner … Continue reading

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